Sept., 1936. The Queensland Naturalist 
7 
With such divergent interpretations of the one ex- 
posure, it was delightful to be able to re-examine it in con- 
junction with Professor Richards and Dr. Bryan. Though 
not a large section it is certainly very remarkable, if not 
unique, for it gives a clear “ proof” that two opposing 
views are correct. We found the shale to be covered by a 
soil slip, but, beside the position of the shale is typical 
mesozoic sandstone with vertical dip, and beside this again 
is volcanic fragmentary rock of which there is an exten- 
sive exposure. 
Following (1) along the line of the sandstone strata 
to near the water’s edge the volcanic rock appeared to 
have been injected into and to have flowed round the 
broken end of the strata. By following another line (2) 
across the stratification the sandstone was found to become 
less typical, and to change gradually — that is not suddenly 
— though rapidly into the volcanic aggregate. Starting 
from a pure sandstone it contained more and more vol- 
canic material and less and less sand. Some of the vol- 
canic fragments appear waterworn. A line of demarca- 
tion between the two rocks was sought for but not found, 
samples from either side of the only suggested line leaving 
no doubt, on examination, that they were the same rock 
of sand and volcanic material. 
This second line of section shows, therefore, quite 
clearly that the volcanic rock is continuous with the 
mesozoic sandstone, and contemporaneous with it, while 
the first no less clearly shows it to be more recent. 
We like to think that Dame Nature never lies, but at 
Christmas Creek, within a few yards, she tells two plain 
and convincing, but utterly inconsistent, stories. There 
seems to be some room for complaint on the part of the 
simple geologist who seeks only the truth. 
As well as the section at Christmas Creek, we were 
able to visit on Widgee Creek an occurrence recorded by 
Mr. C. C. Morton, where a basalt flow or sill dips parallel 
to the strata. As exposed now there seems no reasonable 
doubt that the basalt is a sill, or dyke, intruded between 
the layers of sedimentary rock. It is necessarily later than 
the strata it is injected into, but might be only a little 
later in the Mesozoic, or much later in the Tertiary period. 
# Perhaps future excursions will elucidate the problem 
which so far has become more complicated the more we 
see of it. 
